Một số có 2 chữ số , sẽ giảm đi bao nhiêu đơn vị nếu bớt đi 3 ở hàng chục?
CÓ LỜI GIẢI NHÉ!
K
Khách
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Những câu hỏi liên quan
HT
11
LT
7 tháng 8 2018
a) Nếu chữ số hàng chục bớt đi 3 thì số a giảm 30 đơn vị
b) Nếu chữ số hàng chục tăng thêm 4 thì số a tăng thêm 40 đơn vị
c) Nếu chữ số hàng chục tăng thêm 1 và chữ số hàng đơn vị giảm đi 1 thì số a tăng thêm 9 đơn vị.
Tk cho mình nha ae!!!!!!!!!!!!!!
TT
1 tháng 7 2016
Gọi các chữ số hàng nghìn , trăm , chục , đơn vị lần lượt là abcd
Theo đề bài ta có:abcd = 1188+ab
Trong phép cộng, khi cộng 2 chữ số trong cùng một hàng thì có nhớ nhiều nhất là 1 nên ab chỉ có thể là 11 hoặc 12
Nếu ab = 11 thì abcd =1188 + 11 = 1199
Nếu ab = 12 thì abcd = 1188 + 12 = 1200
Vậy ta tìm đc 2 số thỏa mãn đề bài là : 1199 và 1200
Đs:1199 và 1200
Nhớ k mk nhe!!!
DA
7 tháng 12 2018
xóa chữ số hđv thì số đó giảm 10 lần
số ban đầu là: 1188:(10-1)=132
đáp số:...
mk nghĩ bài này chỉ tìm dc số có 3 chữ số thôi, k mk nhé
7 tháng 12 2018
16383
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NT
0
Gọi số có 2 chữ số là \(\overline{ab}\)
Nếu giảm bớt đi 3 ở hàng chục thì số đó là : \(\overline{\left(a-3\right)b}\)
Vậy số đó sẽ giảm 30 đơn vị.
sẽ giảm đi 10 lần + 3 đơn vị